The winners of the design world's most lucrative prize have been
announced.

Among the five receipients of Index: Design to Improve
Life's 2013 awards are Raspberry Pi, a paper sheet that preserves fruit and vegetables
and a concept for smart highways that charge electric cars on the
go.

The five winners, chosen for their potential to improve living
standards, will share the Danish non-profit's €500,000 prize,
receiving €100,000 each.